\begin{figure}
\begin{flushright}
\subfigure{\includegraphics[width=0.5\textwidth]{figures/perf1.pdf}} \\*
\subfigure{\hspace{0.79in}\includegraphics[width=0.39\textwidth]{figures/perf2.pdf}}
\end{flushright}
\caption{Lorem}
\label{fig:sparse}
\end{figure}
